JPH0896392A - Lens cleaner for cd player - Google Patents

Abstract

PURPOSE: To dottedly arrange cleaning members, which have no possibilities of breakage and adverse influence on feed mechanism, retain a high cleaning capacity and do not flaw the coating layer of a pickup lens even if a disk is held by feed rollers, within a lead-in area of the disk. CONSTITUTION: The cleaning members 3a, 3b, 4a, 4b formed into an approximately conical shape by silicone rubber, etc., subjected to a foaming treatment are dottedly disposed within the lead-in area 2a of the disk 2 having the same shape as the compact disk. Among these members, 3a, 3b are previously coated with a cleaning liquid and to execute cleaning of the pickup lens 6. The cleaning members 4a, 4b wipe away the cleaning liquid stuck on the pickup lens 6. At least one cleaning member 4b is arranged on the outer circumference side more outside than the cleaning members 3a, 3b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens cleaner used for cleaning a pickup lens of a CD player loaded with a compact disc.

[0002]

2. Description of the Related Art A CD player has a built-in pickup lens for irradiating the surface of a loaded compact disc with spot light. By rotating the compact disc, the pickup lens extracts reflected light of the spot light. The signal recorded on the disc can be read. Therefore, if foreign matter such as dust adheres to the surface of this pickup lens,
There is a possibility that a signal reading error may occur and the reproduction characteristics may deteriorate.

Therefore, conventionally, a disc having the same shape as the compact disc is provided with a cleaning member made of brush bristles or cloth material, and the cleaning member can be cleaned by bringing the cleaning member into contact with the surface of the pickup lens when the disc is rotated. A lens cleaner that has been proposed is proposed. As a specific example of such a conventional lens cleaner, a brush-shaped cleaning member extending along the radial direction of the disc is provided within a range from the program area of the disc to the lead-in area on the inner peripheral side, or a special feature. As disclosed in Kaihei 2-232878,
For example, a cleaning member including a small amount of brush bristles may be provided at a plurality of locations in the program area of the disc.

In these conventional lens cleaners, in consideration of the distance between the pickup lens and the disc surface when the pickup lens faces the program area, a cleaning member provided in the program area is approximately 3 m from the disc surface.
It is projected by about m.

[0005]

FIG. 4 is a front view showing a disk feeding mechanism using a roller, which is mainly used in an in-vehicle CD player. Reference numerals 8 and 9 denote feed rollers formed in a substantially columnar shape from a relatively flexible material such as rubber. The compact disc D is held by the pair of feed rollers 8 and 9, and in this state, one of the feed rollers is fed. When the roller rotates, the roller is transferred into and out of the CD player.

Of the pair of feeding rollers 8 and 9, the lower feeding roller 9 facing the recording surface Da of the compact disc D is in contact with the recording surface Da in order to prevent the recording surface Da from being damaged. The taper shape is such that the diameter becomes smaller toward the center, and the compact disc D can be transferred by contacting only the peripheral portion of the compact disc D.

However, when the above-mentioned conventional lens cleaner is used in a CD player having a disc feeding mechanism as shown in FIG. 4, the cleaning member provided in the program area near the outer periphery of the disc is stronger than the feeding roller 9. There is a concern that it may be pressed and damaged, or that the brush bristles, which are the material of the cleaning member, may come off and become entangled with the feed roller 9, the gear for rotating the feed roller 9, and the like.

Further, as described above, in the conventional lens cleaner, the cleaning member is provided only in the program area of the disc or from the lead-in area to the program area. However, it takes time to move, and it is difficult to finish cleaning the pickup lens in a short time.

Further, in such a conventional lens cleaner, a cleaning member is simply brought into sliding contact with the surface of the pickup lens to remove foreign matters such as dust, so that the oil film adhering to the lens cannot be removed. Furthermore, when the contact pressure of the cleaning member with respect to the pickup lens is increased to improve the cleaning ability, the coating layer formed of silicon resin or the like on the surface of the lens is scratched or the rotation of the disc is suppressed. There was a risk that the cleaning operation would be interrupted.

The present invention has been made in view of the problems of the prior art described above, and an object thereof is a C having a disk feeding mechanism for nipping and transferring a disk by a feeding roller.
A lens cleaner for a CD player, which is not likely to damage the cleaning member or adversely affect the feeding mechanism even when loaded in the D player, and has a high cleaning ability, which does not damage the coating layer of the pickup lens. To provide.

[0011]

The above object of the present invention is to provide C
As a cleaning member for contacting the surface of the pickup lens of the D player to clean the lens, a first cleaning member for applying a cleaning liquid to the pickup lens in the lead-in area of a disc having the same shape as the compact disc. And a second cleaning member for wiping off the cleaning liquid applied to the pickup lens by the first cleaning member, and at least one of the second cleaning members is separated from the first cleaning member. Is also achieved by locating on the outer circumference side. In the above means,
It is preferable to record a voice message informing the completion of cleaning of the pickup lens in the program area on the outer peripheral side of the lead-in area of the disc.

[0012]

When the lens cleaner is loaded into a CD player and driven to rotate, the pickup lens that is standing by at the home position first directly faces the lead-in area of the disc, where the pickup lens first approaches the disc surface. The focus servo for focusing while starting the separation is started, and then the tracking servo for correcting the pickup lens to correctly trace the track of the disk is started. And immediately after the start of such focus servo and tracking servo,
Since the movement of the pickup lens toward and away from the disc surface is large, the first and second cleaning members arranged in the lead-in area can be surely brought into contact with the surface of the pickup lens even if the protrusion amount from the disc surface is small. .

Further, since the lead-in area is located on the inner peripheral side of the disk and is an area to be transferred without being pinched by the feed roller of the automatic feeding mechanism, the short cleaning member arranged in this lead-in area is fed. There is no fear of being strongly pressed by the roller, and therefore damage to the cleaning member and adverse effects on the feeding mechanism can be reliably avoided.

Further, the pickup lens first contacts the first cleaning member and is coated with the cleaning liquid,
Then, since the cleaning liquid is wiped off by contacting the second cleaning member, the cleaning ability is improved as compared with the cleaning in which the brush bristles and the cloth material are slidably contacted, and the coating layer of the pickup lens is removed. The risk of scratching is reduced.

Further, since at least one of the second cleaning members for wiping off the cleaning liquid is located on the outer peripheral side of the first cleaning member and finally contacts the pickup lens, it is applied by the first cleaning member. The cleaning liquid can be completely removed without wiping.

Further, since the first and second cleaning members are all provided in the lead-in area of the disc, the amount of movement of the pickup lens can be short until the cleaning is completed, and the pickup lens can be moved in a short time. It becomes possible to perform cleaning.

If a voice message notifying that the cleaning of the pickup lens is completed is stored in the program area on the outer peripheral side of the lead-in area of the disc, the pickup lens moves from the lead-in area to the program area. Immediately after this voice message is reproduced, the user can be prompted to eject the lens cleaner from the CD player, so that there is no unnecessary waiting time after the cleaning of the pickup lens is completed.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 is a plan view showing an embodiment of a lens cleaner according to the present invention, FIG. 2 is a sectional view of a cleaning member provided in the lens cleaner, and FIG. 3 is a view showing cleaning of a pickup lens by the lens cleaner. FIG.

The lens cleaner generally designated by the reference numeral 1 is
In the lead-in area 2a of the disk 2 having the same shape as the compact disk, cleaning members 3a, 3b, which are formed of, for example, foamed silicon rubber into a substantially conical shape,
4a and 4b are arranged in a dotted manner. Of these, reference numerals 3a and 3b represent first cleaning members to which a cleaning liquid is applied in advance when cleaning the pickup lens 3, and reference numerals 4a and 4b are used to wipe off the cleaning liquid adhering to the pickup lens 6. The second cleaning member is shown. The first and second cleaning members 3a, 3b, 4a, 4b are press-fitted into the small holes 2c formed in the disc 2 as shown in FIG. 2, and the adhesive 5 is applied to the upper surface side (label surface side). It is applied and fixed. A protective sheet 7 made of nylon or the like is attached to each cleaning member so as to cover the adhesive 5.

The above first and second cleaning members 3
Arrangement positions of a, 3b, 4a and 4b are as follows. As is apparent from FIG. 1, one of the first cleaning members 3a and one of the second cleaning members 4a are on the same radius ra from the rotation center O of the disk 2 and on the center line passing through the rotation center O. And the other 3b of the first cleaning members are arranged on the radius rb, and the other 4b of the second cleaning members are arranged on the radius rc. The other 3b of the first cleaning member and the other 4b of the second cleaning member are arranged at positions slightly deviated from the symmetrical position with the rotation center O as a boundary. Here, the relationship between the sizes of the radii ra, rb, and rc is represented by the expression ra <rb <rc, that is, the other 4b of the second cleaning member is more than the first cleaning member 3a and 3b, respectively. It is located on the outer peripheral side.

The first and second cleaning members 3a, 3b, 4 from the lower surface (signal surface) of the disk 2 are also provided.
The protrusion amount H of a and 4b is set to about 2 mm, and when the pickup lens 6 comes into contact with the cleaning member 3a, 3b, 4a, and 4b, the tip portions of the cleaning members 3a, 3b, 4a, and 4b are easily deformed. There is.

Reference numeral 2b in FIG. 1 is a program area adjacent to the outer periphery of the lead-in area 2a of the disk 2, and in the present embodiment, this program area 2
A voice message notifying that the cleaning of the pickup lens 6 is completed is recorded on the innermost side of b, that is, just outside the lead-in area 2a. The content of this voice message prompts the user to eject the lens cleaner from the CD player, for example, "lens cleaning is completed. Please press the disc eject button." This voice message is not limited to Japanese, but may be recorded continuously in several languages.

Next, the operation of cleaning the surface of the pickup lens 6 of the CD player using the lens cleaner 1 will be described. At the time of cleaning the pickup lens 6, the cleaning liquid is applied to the first cleaning members 3a and 3b in advance. The cleaning liquid used here is a liquid in which alcohol and purified water are mixed at a ratio of 1: 9. As described above, since each cleaning member is formed of the foamed rubber material, the cleaning liquid is sufficiently permeated when the cleaning liquid is applied.

After that, when the lens cleaner 1 is loaded into a CD player (not shown) and rotated, the pickup lens 6 standing by at the home position first directly faces the lead-in area 2a of the disc 2. There, a focus servo is first started in which the pickup lens 6 focuses on the recording surface of the disc 2 while moving toward and away from the recording surface of the disc 2, and then a tracking servo for correcting the pickup lens 6 so as to correctly trace the track of the disc 2. Is started. When the focus servo or tracking servo is directly faced with the lead-in area 2a, the pickup lens 6 moves closer to and away from the recording surface of the disc 2 than when the program area 2b is directly faced. So
First and second parts arranged in the lead-in area 2a
The cleaning members 3a, 3b, 4a, 4b can be reliably brought into contact with the surface of the pickup lens 6 even if the protrusion amount H from the recording surface of the disc 2 is as small as 2 mm.

At the time of cleaning, first one of the first cleaning members 3a and one of the second cleaning members 4a located on the inner peripheral side of the disk 2 alternately contact the surface of the pickup lens 6. At this time, since each cleaning member is made of a foamed rubber material or the like and is extremely flexible, the tip side is easily deformed as shown by the chain double-dashed line in FIG. It slides on the lever pickup lens 6. Therefore, when the cleaning member comes into contact, the pickup lens 6 is strongly pushed back downward in the drawing and the focus servo does not come off. The arrow A in the figure indicates the rotation direction of the disk 2.

Then, while the disk 2 makes one rotation, the cleaning liquid is applied to the pickup lens 6 by the first cleaning member 3a, and then the cleaning liquid is wiped off by the second cleaning member 4a. It is supposed to be held once. Since the pickup lens 6 gradually moves from the inner peripheral side of the disc 2 toward the outer peripheral side (in the direction of arrow B in FIG. 3), one cleaning member is indicated by the chain double-dashed line in FIG. (For example, the first cleaning member 3a) moves relatively on the surface of the pickup lens 6 in the direction opposite to the arrow B. Therefore, the surface of the pickup lens 6 is entirely slidably contacted with each cleaning member to be cleaned. The moving direction of the cleaning member (rotating direction of the disk 2) in FIG. 3 is from the back side of the paper to the front side.

When the pickup lens 6 continues to move toward the outer peripheral side of the disk 2, the other first cleaning member 3b begins to slide on the pickup lens 6,
When the pickup lens 6 moves further, the disc 2
The other second cleaning member 4b, which is located closest to the outer circumference, starts sliding contact with the pickup lens 6. Then, all the cleaning members 3a, 3b, 4a, 4b are brought into sliding contact with the surface of the pickup lens 6 one after another by the rotation of the disk 2, and the cleaning liquid is applied to the pickup lens 6 and the wiping operation is continuously performed. Thus, the first surface of the pickup lens 6 is
Since the cleaning liquid is applied by the cleaning members 3a, 3b and the cleaning liquid is wiped off by the second cleaning members 4a, 4b, the brush liquid or the cloth material is slid as in the conventional case. Compared to cleaning by just contacting it, not only dust is easier to remove but also oil film can be removed, improving the cleaning ability,
The risk of damaging the coating layer of the pickup lens 6 is reduced.

When the pickup lens 6 is further moved, the first cleaning member 3a on one side and the second cleaning member 4a on the one side are disengaged from the outside of the pickup lens 6 so as not to come into contact with each other, and then the first cleaning member 3 on the other side. The cleaning member 3b comes off the pickup lens 6,
Finally, the other second cleaning member 4a comes off from the pickup lens 6 and does not come into contact with it, and the cleaning is completed. In this way, the second cleaning liquid is wiped off.
Since the cleaning member 4b finally comes into sliding contact with the surface of the pickup 6 to complete the cleaning, the cleaning liquid applied to the pickup lens 6 by the first cleaning members 3a and 3b can be removed without wiping. There is no possibility of adversely affecting the signal reading performance of the pickup when the compact disc is reproduced after the cleaning. Further, since the cleaning is completed while the pickup lens 6 is directly facing the lead-in area 2a of the disc 2, the pickup lens moves through the lead-in area of the disc and the program area as in the conventional case. Compared to what is cleaned
The pickup lens 6 can be cleaned in a short time.

When the pickup lens 6 is cleaned while facing the lead-in area 2a of the disk 2 and moved to the outer peripheral side of the disk 2 to directly face the program area 2b,
As described above, the voice message recorded on the innermost side of the program area 2b is reproduced to notify that the cleaning of the pickup lens 6 is completed, and prompt the user to eject the lens cleaner 1 from the CD player. It has become. Therefore, the user can play a new compact disc on which music or the like is recorded immediately after the cleaning is completed without spending an unnecessary waiting time without knowing that the cleaning of the pickup lens 6 is completed.

Further, as shown in FIG. 4, when the lens cleaner 1 is loaded in a CD player which employs an automatic feeding mechanism for transferring the compact disc D while being held by feeding rollers 8 and 9, Since the lead-in area 2a on the inner peripheral side of the disc 2 passes over the small diameter portion of the one feed roller 9 facing the recording surface of the disc 2, the short cleaning member 3a arranged in the lead-in area 2a. , 3b, 4a, 4b are not strongly pressed by the feed roller 7. Therefore, the cleaning member 3a,
3b, 4a, 4b themselves are damaged, or the feed rollers 8, 9
There is no risk of adversely affecting the feeding mechanism that drives the.

In this embodiment, two first and second cleaning members are provided, four in total, but the pickup lens 6 can be cleaned even if each cleaning member is provided one by one. However, if a plurality of first and second cleaning members are provided, it is possible to more reliably apply and wipe the cleaning liquid to the pickup lens 6.

Further, in the present embodiment, each cleaning member is made of a foamed rubber material, but the cleaning member may be made of a material other than rubber such as brush bristles or nonwoven fabric.

In this embodiment, the cleaning liquid used is a mixture of alcohol and purified water in a ratio of 1: 9. However, the mixing ratio of alcohol and purified water is 1: 9.
If it is set within the range of 9 to 4: 6, the oil film component on the surface of the pickup lens 6 can be removed, and the coating layer formed of silicon resin or the like is not adversely affected.

[0034]

As described above, the CD according to the present invention
A lens cleaner for a player has a first cleaning member for applying a cleaning liquid to a pickup lens and a second cleaning member for wiping the cleaning liquid from the lens, and is composed of a disc having the same shape as a compact disc. It is arranged in the lead-in area on the inner peripheral side, and the amount of protrusion of each cleaning member from the disc surface is suppressed to a small amount, so even if the disc is pinched by the feed roller, each cleaning member may be damaged. It has the excellent effect that it can be applied to a CD player equipped with an automatic feeding mechanism for vehicles, etc. without the possibility of adversely affecting the feeding mechanism. Also, the cleaning liquid is applied and then wiped off. Since the lens is cleaned, the conventionally used brush bristles and cloth materials are brought into sliding contact. Compared to only clean the dust becomes to be removed even only one oil film easily removed to improve the cleaning capability, and exhibits an excellent effect that even less fear of damaging the coating layer of the lens. Furthermore, by providing all the first and second cleaning members in the lead-in area of the disc, the amount of movement of the pickup lens until the cleaning is completed can be short, and the pickup lens can be cleaned in a short time. It will be possible.
Further, since at least one of the second cleaning members that draws out the cleaning liquid is located on the outer peripheral side of the first cleaning member and finally comes into contact with the pickup lens, the cleaning liquid applied by the first cleaning member is removed. Can be completely removed without wiping. If you record a voice message in the program area outside the lead-in area of the disc that the cleaning of the pickup lens is completed, it will be recorded immediately after the pickup lens moves from the lead-in area to the program area. The voice message is played and the user can be prompted to eject the lens cleaner from the CD player, eliminating unnecessary wait time after cleaning the pickup lens.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a lens cleaner according to the present invention.

FIG. 2 is a cross-sectional view of a cleaning member provided on the lens cleaner.

FIG. 3 is an operation explanatory diagram when the pickup lens is cleaned by the lens cleaner.

FIG. 4 is a front view showing a disc feeding mechanism using rollers.

[Explanation of symbols]

 1 Lens Cleaner 2 Disc 2a Lead-in Area 2b Program Area 3a, 3b First Cleaning Member 4a, 4b Second Cleaning Member 6 Pickup Lens

Claims (2)

[Claims] 1. A lens cleaner for a CD player, wherein a cleaning member is provided on a disk having the same shape as a compact disk, and the cleaning member is brought into contact with the surface of a pickup lens when the disk is rotationally driven to clean the lens. As the cleaning member, a first cleaning member for applying a cleaning liquid to the pickup lens in the lead-in area of the disc, and a cleaning liquid applied to the pickup lens by the first cleaning member are wiped off. Lens for a CD player, characterized in that at least one of the second cleaning members is located on the outer peripheral side of the first cleaning member. Cleaner. 2. The voice message according to claim 1, wherein a voice message indicating that cleaning of the pickup lens is completed is recorded in a program area on the outer peripheral side of the lead-in area of the disc. C
Lens cleaner for D player.